Sürdürülebilir Kalkınma Amaçları

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• BildiriYalnız künye2020/r/munzur/3217
  A risk assessment approach using both stochastic data and subjective judgments

  Mete, Suleyman; Oz, Nurdan Ece; Gul, Muhammet; Serin, Faruk; Celik, Erkan

  Risk assessment describes the overall process regarding identifying hazards and risk factors that have the potential to cause harm, analyzing and evaluating the risk associated with that hazard and determining appropriate ways to eliminate the hazard or control the risk. In the literature, lots of approaches are proposed to prioritize hazards and associated risks quantitatively. Fuzzy sets-based multi-criteria decision-making approaches are forefront that they have the ability in expressing the risks verbally based on decision-maker’s opinions and judgments. MCDA-based risk assessment approaches explain different types of uncertainties, which are generally modeled using stochastic analysis or fuzzy sets. The stochastic analysis is more suitable in modelling the probabilistic uncertainty. Therefore, in this study, a risk assessment approach using both stochastic data and subjective judgments is proposed, and a case study is also performed in a construction project. The VIKOR method is extended and a new risk assessment approach is developed where part of the data is stochastic. A three-year data is used to determine a fitted probability distribution of respected frequency. Evaluation of risks with respect to severity and probability parameters are then made by subjective judgments. In conclusion, a risk prioritization and potential action plan suggestion is performed.

  AtıfScopus2·OpenAlex3

  İncele
• Yüksek Lisans TeziAçık Erişim2019/r/munzur/6980
  Pisagor bulanık küme tabanlı Topsıs ile risk değerlendirme: doğal gaz boru hattında bir uygulama

  Nurdan Ece Öz

  Ülkelerin kalkınma ve gelişmesindeki en önemli faktörlerden biri olan enerji, yaşamın devamı için temel gereksinimlerden biridir. Ülkeler de bu devamlılığı sağlamak adına enerji kaynakları üzerinde söz sahibi olmak için, birbirleriyle siyasi ve ekonomik boyutta büyük bir mücadele içindedirler. Doğal gaz boru hattı projesi, doğal gazın çıkarıldığı ülkeden diğer ülkelere taşınmasını sağlayan sistemlerin yapımını hedefleyen geniş çapta büyük projelerdir. Bu tür büyük ve karmaşık projelerde temel amaç, işçi ve işveren sağlığını korumak, çalışanlara güvenli çalışma ortamı yaratmak, yapılan işten ve çalışma ortamından kaynaklı ortaya çıkan riskleri en aza indirmektir. Ortaya çıkan bu riskleri mümkünse bertaraf etmek için değilse riskleri en asgari seviyeye indirecek belirli iş sağlığı ve güvenliği standartlarına ve yapılacak işe uygun risk değerlendirmeleri yapılmalıdır. Bu çalışmada, geçmişten günümüze alışıla gelmiş geleneksel risk değerlendirme metotlarından farklı olarak yeni bir metot geliştirilmesi amaçlanmıştır. Başlangıçta iki boyutlu (2B) risk matris yöntemi uygulanmış ve risk değerlendirmesinin ilk adımında tanımlanan tehlikeleri öncelikli olarak sıralamak için Pisagor bulanık küme tabanlı TOPSIS yöntemi uygulanmıştır. Bulanık model doğal gaz boru hattı yapım projesinin temizleme ve tesviye faaliyeti için kullanılmıştır.

  İncele
• MakaleYalnız künye2019Scopus SJRQ2/r/munzur/3705
  Risk assessment for clearing and grading process of a natural gas pipeline project: An extended TOPSIS model with Pythagorean fuzzy sets for prioritizing hazards

  Oz, Nurdan Ece; Mete, Suleyman; Serin, Faruk; Gul, Muhammet

  A natural gas pipeline project is a broad construction system consisting of both offshore and onshore section, which aims to supply the natural gas to one country to another. In such these projects, main focus of the works should cover workplace, environment, health, and safety of workers and employers. To achieve this, a new occupational health and safety (OHS) risk assessment is necessary for reducing the negative effects of emerged risks. In this article, a fuzzy-based risk model is developed for prioritizing primary and residual risk. A two-dimensional (2D) risk matrix method is initially performed and the Pythagorean fuzzy technique for order preference by similarity to ideal solution (PFTOPSIS) method is then used to prioritize previously identified hazards. For the prioritization of primary and residual risks, hazards are assessed against two parameters (probability and severity) of 2D risk matrix. Unlike previous risk assessment studies, PFTOPSIS is applied for the first time. The fuzzy model is applied to a case study for clearing and grading process of a natural gas pipeline project. A sensitivity analysis is also performed on parameter weights in order to validate the model.

  AtıfScopus93·WoS80·OpenAlex97

  İncele
• MakaleYalnız künye2019Scopus SJRQ1/r/munzur/3701
  A decision-support system based on Pythagorean fuzzy VIKOR for occupational risk assessment of a natural gas pipeline construction

  Mete, Suleyman; Serin, Faruk; Oz, Nurdan Ece; Gul, Muhammet

  Natural gas pipeline construction projects are major projects between countries that include onshore and offshore sections. Aim of these projects is to supply the natural gas from one place to another. Safety of workplace, environment and employers is also another important argument. In this respect, it is essential to conduct an occupational risk assessment (ORA) study to eliminate the risks that may arise around the pipeline. Application of multi-criteria decision analysis (MCDA) methods for the ORA has shown great increase recently. Also, developing a decision support system (DSS) which is easy to use and capable of extracting results enables decision makers to assess health and safety risks. Therefore, (i) A DSS based on Pythagorean fuzzy VIKOR (PFVIKOR) in ORA literature is developed for the first time; (ii) A case study is employed to risk assessment for trenchless crossings installation by auger boring process of the pipeline project; (iii) A sensitivity analysis is performed in the results of PFVIKOR-based DSS; and (iv) Two additional risk parameters called sensitivity to PPE non-utilization and undetectability are considered in ORA process apart from the classical risk assessment parameters of severity and probability. Developing such a DSS and applying it for risk assessment in a natural gas pipeline construction will contribute stakeholders in the energy industry.

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  AtıfScopus89·WoS67·OpenAlex83

  İncele